<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>标签</title>
	</head>
	<body>
		<h1 align="left">一级标题</h1>
		<h2 align="center">二级标题</h2>
		<h3 align="right">三级标题</h3>
		<h4>四级标题</h4>
		<h5>五级标题</h5>
		<h6>六级标题</h6>
	</body>
</html>